A270860 Least Quasi-Carmichael number with n prime factors.

35, 165, 6545, 179998, 7509579, 850253030

Offset: 2

Author

Tim Johannes Ohrtmann, Mar 24 2016

Keywords

• nonn
• more
• hard

Examples

			6545 = 5*7*11*17 and 12, 14, 18, 24 all divide 6552.
		

Crossrefs

Cf. A257750 (Quasi-Carmichael numbers).

Programs

Perl

use ntheory ":all"; my $f=2; forcomposites { say $f++," $" if scalar(factor($))==$f && is_quasi_carmichael($); } 1e9; # _Dana Jacobsen, Apr 27 2017

Extensions

a(7) from Dana Jacobsen, Apr 04 2016